JP2592559Y2 - Photo printing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a photographic printing apparatus in which a printing paper having a predetermined length is securely used at the rear end of a long photographic printing paper, and a printing paper having a predetermined length or less is not used. The present invention relates to a technique for increasing the yield of paper and performing printing without obstruction.

[0002]

2. Description of the Related Art In a conventional photographic printing apparatus for printing on color photographic paper having a length longer than that of a 135-type negative, a trailing end portion of the long photographic paper detects a winding diameter close to the final winding diameter with a sensor. , Place the sensor at a position far away from the measuring cutter position, detect the trailing edge of the photographic paper with the sensor, stop feeding the photographic paper, and stop the remaining photographic paper scroll.
The roll is removed and discarded, and a new long-print paper scroll is reloaded and restarted.

[0003]

With such a detecting means at the terminal portion of the photographic paper scroll, some expensive photographic papers which can still be normally used are inevitably empty and discarded. become. To avoid this, if it is used without waste, there is a danger that the print printed on small-sized photographic paper will be delivered to the customer, or the terminal strip smaller than the minimum size will be cut off and transported to the transport path. If it enters, it may not be able to be sent and may jam on the transport path.

The present invention solves such a conventional problem and effectively uses the end portion of the photographic paper scroll to the end without waste, and eliminates the generation of small prints, and conveys by a strip smaller than the minimum size. An object of the present invention is to provide a photographic printing apparatus in which obstacles to road blockage are eliminated.

[0005]

This object is achieved by the following technical means (1) or (2) .

(1) In a photographic printing apparatus in which a scroll in which a photographic paper of a predetermined width is wound into a long roll is loaded and printing is performed, a trailing edge detection means for the photographic paper pulled out from the scroll loading section and the printing paper a total length feeding means and the cutter of the indicia image sheet to a total length cut the printing paper to a predetermined length is provided, becomes larger than the minimum value of the meter scale cutting length the distance between the detecting means and the cutter And the feeding means is constituted by means including at least a pair of conveying rollers provided on the conveying path at intervals smaller than the minimum value of the measuring cut length, and the detecting means detects the trailing edge. A photo printing device characterized in that the cutter is not operated at the time of feeding and is sent. (2) The distance between the detection means and the cutter is
It was set to be slightly larger than the minimum value of the measuring length.
The photographic printing apparatus according to the item (1), wherein:

[0007]

EXAMPLES The embodiment of the present invention a schematic front sectional view of FIG. 1,
FIG. 2A is a front view of the photographic paper scroll, and FIG.
Development of photographic paper, scale-cut photographic paper of FIG. 2 (c)
This will be described with reference to a plan view of FIG .

[0008] Scroll 13 of photographic paper 13 wound around core 12
a is stored in the magazine 11 and the printing paper 13 is pulled out from its outlet 13 through its leading end 13f , which is a leading end standby position to be described later.
It is set at the cutter cutting position. Followed by
The photographic paper 13 is fed out while being sandwiched between the transport roller pairs 22 and 23, fed to a length of a required size, and cut by the cutter 21 into a measuring length of each set size. Thus the paper 13 c that has been cut is Keishaku to the required dimensions length in the is carried so as to be positioned at an exposure position 27a on the suction belt 27, uniformly illuminated by the exposure lamp 32 and reflector 33 The negative screen of the negative mounting table 31 is cut at the exposure position 27a.
And exposed on to the print paper 13 c are to be imaged. The suction belt 27 is provided so as to be wound around a pair of rollers 24, 25 at both ends and an intermediate tension roller 26. A large number of suction holes are formed in the belt surface, and suction is applied to a decompression chamber inside the belt. with the plane of the total length cut came paper 13 c is held by being the center of the photographic paper 13 c is positioned in a state of being fitted to the exposure optical axis.

After the completion of the exposure in the photographic printing apparatus 20, the transport rollers 41, 42, 43, 44 and 45 sequentially transport the transport rollers 41 to the developing section 50 where they are immersed in a processing liquid and dried. The print is finished and collected.

Then, each pair of adjacent transport rollers 22, 2
The distance Y between 3, 24 and 25, 41, 42, 43, 44, 45 is smaller than the minimum photographic paper measuring length a.

A sensor 15 for detecting the rear end of the photographic paper is provided at or near the photographic paper outlet 14, and the distance between the sensor 15 and the cutter 21 is the minimum of the photographic paper measuring length. This is for X slightly longer than the length a (the length of the minimum size).

A description will be given of how the functions arranged as described above operate.

The photographic paper 13 fed from the photographic paper scroll 13a of the magazine 11 by the conveying roller pairs 22, 23 and 24 is fed by a predetermined measuring length from the cutter 21 which is a normal front end standby position. After stopping, the cutter 21 is operated to cut one sheet of the photographic paper 13c toward the exposure position, and the process is sequentially repeated to stop at the exposure position and perform image exposure on the positioned photographic paper 13c as needed. Done. The alignment of the optical axis center and the photographic paper center at the image exposure position can be adjusted by changing the conveyance amount of the suction belt 27 according to the measuring amount for each size.

[0014] Then, the so conveying rollers between the distance Y is are taken smaller than the length a of the total length cut paper 13c to the minimum size, total length cut paper 13c is of any size Sometimes they are transported correctly.

After the rear end of the photographic paper scroll 13a
A transmissive or reflective light as a trailing edge detecting means provided near the outlet 14 with the end edge 13t unwound from the core 12.
After passing the sensor 15 which is an electric switch, when the sensor 15 detects it, the signal is received and the measurement is completed until now
Cutter 21 which has constantly to the cutting operation is are to be conveyed so as not to operate for each.

At this time, the size of the last photographic paper is longer than the length a of the minimum size and almost shorter than any other size. Therefore, the last photographic paper size does not become insufficiently fed in the middle of the transport path, so that the transport path is not stopped and blocked. This middle cause clogging of the subsequent passage of the loaded paper re disables the result as ing by cause jamming to avoid it
Ru important.

Since the last photographic paper is not smaller than the minimum size a, a normal print is always obtained when printing is performed in accordance with the minimum size. However, the length of the last photographic paper is + α
Since the length is connected, it is sufficient to cut off the excess part appropriately after collection.

Next, the case of a size larger than the minimum size a will be described. In this case, the length of the rear end portion, that is, the last photographic paper is a + α, but the magnitude of α is 0 <α <a.
And may be shorter than the required size. Therefore, the corresponding exposure is not given, and the image is directly sent to the developing section and the image is developed. However, since no image is obtained, the image does not reach customers. In this case, the corresponding negative is printed and exposed on the scale- cut photographic paper 13c at the leading end when the next new photographic paper scroll is loaded while being stopped at the exposure position.

In this way, the half-width strip of the photographic paper is not left in the transport path and causes a cause of jamming or scuffing of the subsequent photographic paper. Processing can be performed without any odd print.

[0020]

[Effect of the invention] A mark of a half-sized size which is small according to the invention.
Jams and scratches due to the fact that printed products printed on paper will not be mixed with non-defective products and will not reach the hands of customers etc., and the occurrence of the last piece of photographic paper that will be cut below the minimum size will be eliminated. In addition, the waste of expensive color photographic paper has been eliminated, and effective use with a high yield has been made possible.

[Brief description of the drawings]

FIG. 1 is a front sectional view schematically showing an embodiment of the present invention.

FIG. 2A is a front view of a photographic paper scroll.
(B) is a development view of the photographic paper, and (c) is a scale cut.
FIG. 3 is a plan view of the printing paper.

[Explanation of symbols]

11 Magazine 12 Core 13 Photographic paper 13a Paper scroll 13c meter long cut paper 13f tip (top) 13t trailing edge 14 Exit 15 Trailing edge detection means (sensor) 20 Photographic printing equipment 21 Cutter 22,23,24,25,41,42,43,44,45 Transport roller pair 27 Suction belt

Claims (2)

(57) [Scope of request for utility model registration] 1. A photographic printing apparatus in which a scroll formed by winding a photographic paper having a predetermined width into a long roll is loaded and printed, a trailing edge detection means for the photographic paper drawn out from the scroll loading section and the printing. a total length feeding means and the cutter of the indicia image sheet to a total length cut paper to a predetermined length is provided, to be greater than the minimum value of the meter scale cutting length the distance between the detecting means and the cutter Provided, and said feeding means,
It is constituted by means including at least a pair of conveying rollers provided at intervals smaller than the minimum value of the measuring cut length on the conveying path, and when the detecting means detects the trailing edge, the cutter is not operated so as to feed the sheet. A photo printing apparatus characterized in that: 2. A distance between said detecting means and said cutter.
So that the separation is slightly larger than the minimum value of the measuring cut length.
2. The photographic printing apparatus according to claim 1, wherein
Place.